Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to Samsung range / ovens
- Confidence medium
- Also displayed as C20, E21, E27, E28
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
The oven control is reading an open, shorted or otherwise implausible temperature-sensor circuit.
Most likely causes
- The oven temperature sensor has failed
- The sensor harness or connector is loose or heat-damaged
- The main control sensor-input circuit is faulty
Safe checks for the owner
- Turn the oven off and let it cool.
- Do not use the oven if it overheats, underheats severely or shows the code repeatedly.
- Inspect only for visible damage without removing live panels.
Estimated U.S. repair cost
$220–$440, depending on model, access, parts availability and local labor.